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package cn.net.greenet.device.servlet;

import cn.net.greenet.db.HibernateUtil;
import cn.net.greenet.db.bean.Dpiendpointbean;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;

/**
 * 验证添加设备的名称是否唯一
 *
 * @author LiuShang
 */
@WebServlet(name = "cn.net.greenet.device.servlet.VerifyDevName", urlPatterns = {"/device/verify_name"})
public class VerifyDevName extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        SessionFactory sf = HibernateUtil.getSessionFactory();
        Session session = sf.openSession();

        PrintWriter out = response.getWriter();
        try {
            Dpiendpointbean bean = null;
            //SELECT dpi FROM Dpiendpointbean AS dpi WHERE dpi.name=:name
            Query query = session.createQuery("FROM Dpiendpointbean");
//            query.setParameter("name", name);
            List l = query.list();
            JSONArray jSONArray = new JSONArray();
            for (int i = 0; i < l.size(); i++) {
                bean = (Dpiendpointbean) l.get(i);
                jSONArray.add(bean.getName());
            }

//            }
//            if(l.isEmpty()){
            out.println(jSONArray);
//            }else{
//                out.println("{\"result\":\"false\"}");
//            }
        } catch (Exception e) {
            out.println("[]");
        } finally {
            out.close();
            session.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
